Provided by: coreutils_8.21-1ubuntu5.4_amd64 bug


       df - report file system disk space usage


       df [OPTION]... [FILE]...


       This  manual  page  documents the GNU version of df.  df displays the amount of disk space
       available on the file system containing each file name  argument.   If  no  file  name  is
       given,  the space available on all currently mounted file systems is shown.  Disk space is
       shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set,  in
       which case 512-byte blocks are used.

       If  an  argument is the absolute file name of a disk device node containing a mounted file
       system, df shows the space available on that file system rather than on  the  file  system
       containing  the  device  node  (which is always the root file system).  This version of df
       cannot show the space available on unmounted  file  systems,  because  on  most  kinds  of
       systems doing so requires very nonportable intimate knowledge of file system structures.


       Show  information about the file system on which each FILE resides, or all file systems by

       Mandatory arguments to long options are mandatory for short options too.

       -a, --all
              include dummy file systems

       -B, --block-size=SIZE
              scale sizes by SIZE before printing them.  E.g., '-BM' prints  sizes  in  units  of
              1,048,576 bytes.  See SIZE format below.

       -h, --human-readable
              print sizes in human readable format (e.g., 1K 234M 2G)

       -H, --si
              likewise, but use powers of 1000 not 1024

       -i, --inodes
              list inode information instead of block usage

       -k     like --block-size=1K

       -l, --local
              limit listing to local file systems

              do not invoke sync before getting usage info (default)

              use  the  output format defined by FIELD_LIST, or print all fields if FIELD_LIST is

       -P, --portability
              use the POSIX output format

       --sync invoke sync before getting usage info

              elide all entries insignificant to available space, and produce a grand total

       -t, --type=TYPE
              limit listing to file systems of type TYPE

       -T, --print-type
              print file system type

       -x, --exclude-type=TYPE
              limit listing to file systems not of type TYPE

       -v     (ignored)

       --help display this help and exit

              output version information and exit

       Display values are in units of  the  first  available  SIZE  from  --block-size,  and  the
       DF_BLOCK_SIZE,  BLOCK_SIZE  and BLOCKSIZE environment variables.  Otherwise, units default
       to 1024 bytes (or 512 if POSIXLY_CORRECT is set).

       SIZE is an integer and optional unit (example: 10M is 10*1024*1024).  Units are K,  M,  G,
       T, P, E, Z, Y (powers of 1024) or KB, MB, ... (powers of 1000).

       FIELD_LIST  is  a  comma-separated list of columns to be included.  Valid field names are:
       'source', 'fstype',  'itotal',  'iused',  'iavail',  'ipcent',  'size',  'used',  'avail',
       'pcent' and 'target' (see info page).


       Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.


       Report df bugs to
       GNU coreutils home page: <>
       General help using GNU software: <>
       Report df translation bugs to <>


       Copyright  ©  2013  Free  Software  Foundation, Inc.  License GPLv3+: GNU GPL version 3 or
       later <>.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.


       The  full  documentation  for  df  is  maintained as a Texinfo manual.  If the info and df
       programs are properly installed at your site, the command

              info coreutils 'df invocation'

       should give you access to the complete manual.